<template>
  <div class="login">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">智能劳动合同审核系统</h3>
      <p class="subtitle">为毕业生提供专业的合同风险评估服务</p>
      
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          auto-complete="off"
          placeholder="请输入账号"
        >
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          auto-complete="off"
          placeholder="请输入密码"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="loginForm.code"
          auto-complete="off"
          placeholder="请输入验证码"
          style="width: 63%"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img"/>
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="medium"
          type="primary"
          style="width:100%;"
          @click.native.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div class="register-section" v-if="register">
          <span class="register-text">还没有账号？</span>
          <router-link class="register-link" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>
    
    <div class="el-login-footer">
      <span>Copyright 2024-2025 智能劳动合同审核系统 All Rights Reserved.</span>
    </div>
  </div>
</template>

<script>
import { getCodeImg } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from '@/utils/jsencrypt'

export default {
  name: "Login",
  data() {
    return {
      codeUrl: "",
      loginForm: {
        username: "admin",
        password: "admin123",
        rememberMe: false,
        code: "",
        uuid: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", message: "请输入您的账号" }
        ],
        password: [
          { required: true, trigger: "blur", message: "请输入您的密码" }
        ],
        code: [{ required: true, trigger: "change", message: "请输入验证码" }]
      },
      loading: false,
      // 验证码开关
      captchaEnabled: true,
      // 注册开关
      register: false,
      redirect: undefined
    };
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect;
      },
      immediate: true
    }
  },
  created() {
    this.getCode();
    this.getCookie();
  },
  methods: {
    getCode() {
      getCodeImg().then(res => {
        this.captchaEnabled = res.captchaEnabled === undefined ? true : res.captchaEnabled;
        if (this.captchaEnabled) {
          this.codeUrl = "data:image/gif;base64," + res.img;
          this.loginForm.uuid = res.uuid;
        }
      });
    },
    getCookie() {
      const username = Cookies.get("username");
      const password = Cookies.get("password");
      const rememberMe = Cookies.get('rememberMe')
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password === undefined ? this.loginForm.password : decrypt(password),
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
      };
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true;
          if (this.loginForm.rememberMe) {
            Cookies.set("username", this.loginForm.username, { expires: 30 });
            Cookies.set("password", encrypt(this.loginForm.password), { expires: 30 });
            Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 });
          } else {
            Cookies.remove("username");
            Cookies.remove("password");
            Cookies.remove('rememberMe');
          }
          this.$store.dispatch("Login", this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || "/" }).catch(()=>{});
          }).catch(() => {
            this.loading = false;
            if (this.captchaEnabled) {
              this.getCode();
            }
          });
        }
      });
    }
  }
};
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background: linear-gradient(135deg, #1890ff 0%, #36cfc9 100%);
  position: relative;
  overflow: hidden;
  
  &::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 40%);
    pointer-events: none;
  }
}

.title {
  margin: 0px auto 10px auto;
  text-align: center;
  font-size: 28px;
  font-weight: bold;
  color: #409EFF;
}

.subtitle {
  margin: 0 auto 30px;
  text-align: center;
  font-size: 16px;
  color: #666;
}

.login-form {
  position: relative;
  border-radius: 8px;
  background: #ffffff;
  width: 400px;
  padding: 35px 35px 15px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  
  .el-input {
    height: 40px;
    
    input {
      height: 40px;
      padding-left: 35px;
      font-size: 14px;
      border-radius: 4px;
      
      &:focus {
        border-color: #409EFF;
      }
    }
  }
  
  .input-icon {
    height: 40px;
    width: 14px;
    margin-left: 6px;
    color: #909399;
  }
}

.register-section {
  margin-top: 15px;
  text-align: center;
  
  .register-text {
    color: #606266;
    font-size: 14px;
  }
  
  .register-link {
    color: #409EFF;
    margin-left: 8px;
    text-decoration: none;
    
    &:hover {
      color: #66b1ff;
    }
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 40px;
  float: right;
  
  img {
    cursor: pointer;
    vertical-align: middle;
    border-radius: 4px;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-size: 12px;
  letter-spacing: 1px;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.login-code-img {
  height: 40px;
  border-radius: 4px;
}
</style>
